…..the Total Station is at Junction 3 of the Calais port exit road and is a Truck stop as has been said.
There are pumps for private vehicles and there is plenty of room at these for the biggest outfits.
You need the 3rd exit off the roundabout at the end of the slip road and the entrance is on your right.
Rue Costes et Bellonte Calais, France
Sat Nav Co-ords 50.955183 1.910334
I personally use Auchan Calais which is the cheapest in the area, has 24/7 opening and accepts UK cards and there is plenty of room for any outfit.
Avenue Roger Salengro, Calais, France
Sat Nav Co-ords 50.94257 1.809998